Miniature semiconductor laser range finder

Abstract

The utility model provides a miniature semiconductor laser range finder, relates to the technical field of range finding, and aims to solve the problem that an integrated flat-plate-shaped main board in a laser range finder in the prior art occupies a large plane space, the miniature semiconductor laser range finder comprises a main body and a main board assembly, the main board assembly is used for processing the laser pulse signal and the echo laser pulse signal to obtain distance information of a target object, the main board assembly comprises a first main board and a second main board, and the first main board and the second main board are connected to the left side and the right side of the main body respectively; and the first mainboard is electrically connected with the second mainboard. According to the miniature semiconductor laser range finder, the occupied area of the mainboard is reduced, the overall layout of the laser range finder is compact, the space utilization rate is improved, the size is reduced, the use requirements of various small instruments can be met, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of ranging, in particular to a micro semiconductor laser rangefinder. Background Art

[0002] A laser rangefinder is an instrument that accurately measures the distance to a target using a laser (also known as laser ranging). Laser rangefinders have the advantages of simple operation, high measurement accuracy, long operating distance, strong anti-interference ability, etc., and are widely used in both military and civilian fields. The selection of the laser wavelength commonly used for ranging on the market is generally based on optical characteristics such as strong atmospheric transmittance and eye safety. The laser ranging method features fast measurement speed and long measurement range.

[0003] Currently, laser ranging technology is gradually being upgraded, and the structure of laser rangefinders is pursuing lighter weight and smaller volume, developing towards miniaturization. In order to make the laser rangefinder meet different miniaturized usage requirements and have a wider applicable range, it is necessary to optimize the layout and structure of the laser rangefinder.

[0004] In existing laser rangefinders, there is a main board which is used to obtain the measured target distance and the measured target angle based on the emission and reception of the laser. The main board is generally an integral flat plate structure, and its installation in the laser rangefinder requires a large planar space, which is not conducive to the miniaturization design of the laser rangefinder. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a micro semiconductor laser rangefinder to solve the problem that the integral flat plate main board in the existing laser rangefinder occupies a large planar space. The micro semiconductor laser rangefinder of the utility model can reduce the occupied area of the main board, make the overall layout of the laser rangefinder compact, improve the space utilization rate, and reduce the volume.

[0006] A micro semiconductor laser rangefinder provided by the utility model includes a main body and a main board assembly. The main board assembly is used to process laser pulse signals and echo laser pulse signals to obtain the distance information of the target object. The main board assembly includes a first main board and a second main board. The first main board and the second main board are respectively connected to the left and right sides of the main body, and the first main board is electrically connected to the second main board.

[0007] As a preferred solution of the utility model, the main body includes a first installation part and a second installation part. The first installation part is connected to the head end of the second installation part. The first main board and the second main board are respectively installed on the left and right sides of the second installation part. The head ends of the first main board and the second main board are in contact with the back side of the first installation part, and their tail ends extend towards the back side of the second installation part.

[0008] As a preferred embodiment of the present utility model, the tail end of the first main board is connected to the tail end of the second main board by a pin. The pin is perpendicularly connected to the first main board and the second main board and is located at the rear side of the second installation part.

[0009] As a preferred embodiment of the present utility model, a transmitting channel and a receiving channel are provided inside the main body. Both the transmitting channel and the receiving channel extend from inside the first installation part to inside the second installation part.

[0010] As a preferred embodiment of the present utility model, a laser emitting component is further included. The laser emitting component includes an emitting lens, a laser diode, and a laser driver circuit board. The emitting lens is installed in the transmitting channel at the first installation part. The laser driver circuit board is installed on the back side of the second installation part and is perpendicularly arranged with respect to the first main board and the second main board. The laser diode is installed on the back side of the second installation part corresponding to the transmitting channel and is connected to the laser driver circuit board.

[0011] As a preferred embodiment of the present utility model, a laser receiving component is further included. The laser receiving component includes a receiving lens, a deflecting prism, an avalanche diode, and a detector driver circuit board. The receiving lens is installed in the receiving channel at the first installation part. The deflecting prism is installed in the receiving channel at the second installation part. The avalanche diode is connected to the detector driver circuit board and corresponds to the deflecting prism. The detector driver circuit board is installed on one side of the second installation part close to the receiving channel. The detector driver circuit board is arranged between the first main board and the second main board and is perpendicularly arranged with respect to the first main board and the second main board.

[0012] As a preferred embodiment of the present utility model, the first installation part has a cylindrical structure, and the second installation part has a box-shaped structure with an opening on one side. The area of the connection between the second installation part and the first installation part is smaller than the area of the back side of the first installation part. The detector driver circuit board is installed at the opening and closes the opening.

[0013] As a preferred embodiment of the present utility model, a sealing groove is provided on the first installation part. The sealing groove is arranged along the circumference of the first installation part.

[0014] Compared with the prior art, the present utility model has the following positive effects:

[0015] The miniature semiconductor laser rangefinder provided by the present utility model includes a main body and a main board assembly. The main board assembly is used to process laser pulse signals and echo laser pulse signals to obtain the distance information of the target object. The main board assembly includes a first main board and a second main board. The first main board and the second main board are respectively connected to the left and right sides of the main body, and the first main board is electrically connected to the second main board. In the present utility model, by setting the main board assembly to form a first main board and a second main board, compared with the existing integrated flat main board structure, the occupied area of the main board is reduced, the overall layout of the laser rangefinder is made compact, the space utilization rate is improved, and the volume is reduced, so that it can meet the use requirements of various small instruments and has a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a schematic structural diagram of the miniature semiconductor laser rangefinder of the present utility model;

[0018] Figure 2 is a top view of the miniature semiconductor laser rangefinder of the present utility model;

[0019] Figure 3 is Figure 2 the sectional view taken along A-A in

[0020] Figure 4 is an exploded view of the miniature semiconductor laser rangefinder of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the main body in the present utility model;

[0022] Figure 6 is the detection principle diagram of the miniature semiconductor laser rangefinder of the present utility model.

[0023] In the figure: 1, main body; 11, first mounting part; 111, sealing groove; 12, second mounting part; 121, opening; 13, emission channel; 14, receiving channel; 21, emission lens; 22, laser diode; 23, laser driver circuit board; 31, first main board; 32, second main board; 33, pin; 41, receiving lens; 42, folding prism; 43, detector driver circuit board; 44, avalanche diode. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In the description of the present utility model, it should be noted that unless otherwise stated, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] The following further describes in detail the specific implementation manners of the present utility model with reference to the drawings.

[0027] Embodiment 1:

[0028] A micro semiconductor laser rangefinder provided in this embodiment, as Figures 1-5 shown, includes a main body 1 and a main board assembly, and the main board assembly is used to process laser pulse signals and echo laser pulse signals to obtain the distance information of the target object.

[0029] The main board assembly includes a first main board 31 and a second main board 32. The first main board 31 and the second main board 32 are respectively connected to the left and right sides of the main body 1. The first main board 31 is electrically connected to the second main board 32, and the first main board 31 and the second main board 32 work together to realize the functions of the main board assembly.

[0030] In this embodiment, by setting the main board assembly to form the first main board 31 and the second main board 32, compared with the existing integrated flat main board structure, the occupied area of the main board is reduced, the overall layout of the laser rangefinder is made compact, the space utilization rate is improved, and the volume is reduced, so that it can meet the use requirements of a variety of small instruments and has a wider application range.

[0031] The micro semiconductor laser rangefinder in this embodiment can be used as a part of the sensing system in application scenarios such as robots, drones, or unmanned driving.

[0032] As a preferred embodiment, the main body 1 includes a first mounting portion 11 and a second mounting portion 12, and the first mounting portion 11 is connected to the head end of the second mounting portion 12. The first main board 31 and the second main board 32 are respectively mounted on the left and right sides of the second mounting portion 12. The head ends of the first main board 31 and the second main board 32 are in contact with the back side of the first mounting portion 11, and their tail ends extend towards the back side of the second mounting portion 12. The first main board 31 and the second main board 32 are attached to the left and right sides of the second mounting portion 12 and fixed to the main body 1 by screws, with a compact structure and reliable connection. The first main board 31 and the second main board 32 are arranged in parallel. The first mounting portion 11 and the second mounting portion 12 are of an integral structure.

[0033] As a preferred embodiment, the tail ends of the first main board 31 and the second main board 32 are connected by a pin 33. The pin 33 is perpendicularly connected to the first main board 31 and the second main board 32 and is located at the rear side of the second mounting portion 12. The pin 33 is welded to the first main board 31 and the second main board 32. The pin 33 is provided with two rows, and the two rows of pins are arranged in parallel vertically. The first main board 31 and the second main board 32 are electrically connected through the pin.

[0034] As a preferred embodiment, as Figure 3 shown, a transmitting channel 13 and a receiving channel 14 are provided in the main body 1. Both the transmitting channel 13 and the receiving channel 14 extend from inside the first mounting portion 11 to inside the second mounting portion 12. The length direction of the transmitting channel 13 is parallel to the length direction of the receiving channel 14. The transmitting channel 13 is arranged below the receiving channel 14, and the first main board 31 and the second main board 32 are arranged on the left and right sides of the transmitting channel 13 and the receiving channel 14.

[0035] The transmitting channel 13 is used for the transmitting light to pass through, and the receiving channel 14 is used for the light reflected from the target object to pass through.

[0036] As a preferred embodiment, the micro semiconductor laser rangefinder of this embodiment further includes a laser emitting component. The laser emitting component includes a transmitting lens 21, a laser diode 22, and a laser driver circuit board 23. The laser diode 22 is used for emitting the laser pulse signal for ranging. The transmitting lens 21 can focus and collimate the laser pulse passing through it. It can be understood that in other embodiments, other emitters can also be used to emit laser. The laser driver circuit board 23 is used for driving the laser diode 22 to emit the laser pulse signal.

[0037] The emission lens 21 is installed in the emission channel 13 at the first mounting part 11. The laser driver circuit board 23 is installed on the back side of the second mounting part 12 and is arranged perpendicular to the first main board 31 and the second main board 32. The laser diode 22 is installed corresponding to the emission channel 13 on the back side of the second mounting part 12 and is connected to the laser driver circuit board 23. The laser driver circuit board 23 is arranged against the back side of the second mounting part 12 and is located on the front side of the pin 33. The laser driver circuit board 23 is installed between the first main board 31 and the second main board 32 without occupying the outer space, making the installation more compact and reducing the occupied space.

[0038] The laser driver circuit board 23 and the emission lens 21 are respectively located at both ends of the emission channel 13. The laser driver circuit board 23 is fixed on the back side of the main body by screws and is connected to the laser diode 22 by soldering. The laser diode 22 is fixed on the main body by a special glue. The laser pulse emitted by the laser diode 22 is transmitted outward through the emission lens 21 in the emission channel 13.

[0039] As a preferred embodiment, the miniature semiconductor laser rangefinder of this embodiment further includes a laser receiving assembly. The laser receiving assembly includes a receiving lens 41, a folding prism 42, an avalanche diode 44 and a detector driver circuit board 43. The avalanche diode 44 is used to sense the laser pulse reflected back by the target object.

[0040] The avalanche photodiode is used as a photodetector. This is because the avalanche photodiode has a large amplification factor and can capture relatively weak reflected laser pulses even in an outdoor environment and amplify them for analysis and calculation. Therefore, it is suitable for laser ranging in an outdoor environment.

[0041] The receiving lens 41 is installed in the receiving channel 14 at the first mounting part 11. The folding prism 42 is installed in the receiving channel 14 at the second mounting part 12. The avalanche diode 44 is connected to the detector driver circuit board 43 and corresponds to the folding prism 42. The detector driver circuit board 43 is installed on one side of the second mounting part 12 close to the receiving channel 14. The detector driver circuit board 43 is arranged against the upper side of the second mounting part 12 and is fixed on the second mounting part 12 by screws. The avalanche diode 44 is fixed on the detector driver circuit board 43 by welding connection. Both the receiving lens 41 and the emission lens 21 are fixed on the main body by a special glue. The laser pulse reflected back by the target object can be focused and collimated by the receiving lens 41 before being sensed by the avalanche diode 44.

[0042] The detector drive circuit board 43 is disposed between the first main board 31 and the second main board 32 and is perpendicular to the first main board 31 and the second main board 32. The detector drive circuit board 43 is located on the front side of the laser drive circuit board 23. The detector drive circuit board 43 is perpendicular to the laser drive circuit board 23. The detector drive circuit board 43 is compactly installed, reducing space occupancy.

[0043] The signal output end of the avalanche diode 44 is fixed on the detector drive circuit board 43. The signal output end of the avalanche diode 44 is connected to the input end of the filter circuit of the detector drive circuit board 43. The output end of the filter circuit of the detector drive circuit board 43 is connected to the signal processing circuit of the main board assembly.

[0044] When the laser rangefinder starts to measure the distance, the laser diode 22 on the laser drive circuit board 23 spontaneously emits photons, which are irradiated onto the target to be measured through the emission lens 21. The reflected laser is transmitted to the folding prism 42 through the receiving lens 41. The avalanche diode 44 receives the reflected laser and converts the optical signal into an electrical signal. This electrical signal is transmitted to the filter circuit of the detector drive circuit board 43. The filter circuit filters the electrical signal, and the filtered electrical signal is then transmitted to the signal processor of the main board assembly for processing and conversion to obtain the distance or angle of the target to be measured.

[0045] The main board assembly is used to obtain the measured target distance and the measured target angle based on the emission and reception of the laser, and transmit the measured target distance and the measured target angle to other products through the terminal wires on the main board assembly.

[0046] As a preferred embodiment, the first mounting portion 11 has a cylindrical structure, and the second mounting portion 12 has a box-shaped structure with an opening 121 on one side. The area of the connection between the second mounting portion 12 and the first mounting portion 11 is smaller than the area of the back side of the first mounting portion 11. The receiving lens 41 and the emission lens 21 are mounted on the first mounting portion 11. In order to receive as many laser pulses reflected by the target object as possible, so as to increase the received light intensity and improve the signal-to-noise ratio, the receiving lens 41 is provided with a receiving window as large as possible, that is, the receiving lens 41 is as large as possible. The area of the receiving lens 41 facing forward is larger than the area of the emission lens 21 facing forward.

[0047] The detector drive circuit board 43 is mounted at the opening 121 and closes the opening 121. The opening 121 is not an opening on the upper side of the receiving channel 14. The receiving channel 14 closes the opening 121, which can avoid affecting the light reception function of the avalanche photodiode.

[0048] As a preferred embodiment, a sealing groove 111 is provided on the first mounting portion 11, and the sealing groove 111 is arranged along the circumference of the first mounting portion 11. The sealing groove 111 can provide a sealed mounting method for the laser rangefinder, so that it has a good waterproof effect. The micro semiconductor laser rangefinder of this embodiment meets the use requirements of gun sighting, hand-held and waterproof.

[0049] As Figure 6 The detection principle of the micro semiconductor laser rangefinder of this embodiment is shown as follows. Among them, the host computer is used to send ranging instructions. The transmitting antenna is the transmitting lens 21, which is used to project the laser pulse signal emitted by the laser driver circuit board onto the target object. The receiving antenna is the receiving lens 41 and the folding prism 42, which are used to receive the echo laser pulse signal reflected by the target object and converge the echo laser pulse signal onto the detector driver circuit board. The control and information processing circuit is the main board assembly. The receiving and transmitting drive circuit includes a laser drive circuit and a detector drive circuit.

[0050] The micro semiconductor laser rangefinder of this embodiment emits a laser pulse to the target object to be ranged, then receives the laser pulse reflected by the target object, and analyzes and calculates the received laser pulse to obtain the distance between the target object and the laser ranging device.

[0051] The above are only the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can make several deformations and improvements without departing from the creative concept of the present invention, and all of them should be covered by the protection scope of the present invention.

Claims

1. A miniature semiconductor laser rangefinder, characterized in that: The invention comprises a main body (1) and a main board component, wherein the main board component is used to process a laser pulse signal and an echo laser pulse signal to obtain distance information of a target object, and the main board component comprises a first main board (31) and a second main board (32), wherein the first main board (31) and the second main board (32) are respectively connected to the left and right sides of the main body (1), and the first main board (31) and the second main board (32) are electrically connected.

2. A miniature semiconductor laser rangefinder according to claim 1, characterized in that: The main body (1) comprises a first mounting portion (11) and a second mounting portion (12); the first mounting portion (11) is connected to the head end of the second mounting portion (12); the first main board (31) and the second main board (32) are respectively mounted on the left and right sides of the second mounting portion (12); the head ends of the first main board (31) and the second main board (32) are in contact with the back side of the first mounting portion (11) and the tail ends thereof are extended toward the back side of the second mounting portion (12).

3. A miniature semiconductor laser rangefinder according to claim 2, characterized in that: The tail end of the first main board (31) is connected to the tail end of the second main board (32) via a plug pin (33); the plug pin (33) is vertically connected to the first main board (31) and the second main board (32) and is located at the rear side of the second mounting portion (12).

4. A miniature semiconductor laser rangefinder according to claim 2, characterized in that: A transmitting channel (13) and a receiving channel (14) are provided in the main body (1); the transmitting channel (13) and the receiving channel (14) both extend from the inside of the first mounting portion (11) to the inside of the second mounting portion (12).

5. A miniature semiconductor laser rangefinder according to claim 4, characterized in that: The invention also comprises a laser emission component, the laser emission component comprising an emission lens (21), a laser diode (22) and a laser driving circuit board (23), the emission lens (21) being mounted in the emission channel (13) at the first mounting portion (11), the laser driving circuit board (23) being mounted on the back side of the second mounting portion (12) and being arranged perpendicularly to the first main board (31) and the second main board (32), and the laser diode (22) being mounted on the back side of the second mounting portion (12) corresponding to the emission channel (13) and being connected to the laser driving circuit board (23).

6. A miniature semiconductor laser rangefinder according to claim 4, characterized in that: The laser receiving assembly also includes a receiving lens (41), a folding prism (42), an avalanche diode (44) and a detector driving circuit board (43); the receiving lens (41) is installed in the receiving channel (14) at the first mounting portion (11); the folding prism (42) is installed in the receiving channel (14) at the second mounting portion (12); the avalanche diode (44) is connected to the detector driving circuit board (43) and corresponds to the folding prism (42); the detector driving circuit board (43) is installed on a side of the second mounting portion (12) close to the receiving channel (14); the detector driving circuit board (43) is arranged between the first main board (31) and the second main board (32) and is arranged perpendicular to the first main board (31) and the second main board (32).

7. A miniature semiconductor laser rangefinder according to claim 6, characterized in that: The first mounting portion (11) is a cylindrical structure, the second mounting portion (12) is a box-shaped structure with an opening (121) on one side, the area of ​​the connection between the second mounting portion (12) and the first mounting portion (11) is smaller than the area of ​​the back side of the first mounting portion (11), and the detector driving circuit board (43) is installed at the opening (121) and is arranged to close the opening (121).

8. The miniature semiconductor laser rangefinder according to claim 2, characterized in that: A sealing groove (111) is provided on the first mounting portion (11), and the sealing groove (111) is provided along a circumference of the first mounting portion (11).

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